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Converting a Java Keystore into PEM Format

...- keystore in java format. foo.p12 - keystore in PKCS#12 format. foo.pem - all keys and certs from keystore, in PEM format. (This last file can be split up into keys and certificates if you like.) Command summary - to create JKS keystore: keytool -keystore foo.jks -genkeypair -alias foo \ ...
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Purpose of Python's __repr__

... __repr__ should return a printable representation of the object, most likely one of the ways possible to create this object. See official documentation here. __repr__ is more for developers while __str__ is for end users. A ...
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What is the easiest way in C# to trim a newline off of a string?

...impression \n was not a white space but it is and .TrimEnd and .Trim clear all white space characters natively – David Carrigan May 13 '15 at 20:46 ...
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What is the difference between dict.items() and dict.iteritems() in Python2?

... It's part of an evolution. Originally, Python items() built a real list of tuples and returned that. That could potentially take a lot of extra memory. Then, generators were introduced to the language in general, and that method was reimplemented as an ite...
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Batch file to delete files older than N days

I am looking for a way to delete all files older than 7 days in a batch file. I've searched around the web, and found some examples with hundreds of lines of code, and others that required installing extra command line utilities to accomplish the task. ...
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What is the LD_PRELOAD trick?

...ibrary (including the C runtime, libc.so). So to run ls with your special malloc() implementation, do this: $ LD_PRELOAD=/path/to/my/malloc.so /bin/ls share | improve this answer | ...
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Back to previous page with header( “Location: ” ); in PHP

...this may not work with secure pages (HTTPS) and it's a pretty bad idea overall as the header can be hijacked, sending the user to some other destination. The header may not even be sent by the browser. Ideally, you will want to either: Append the return address to the request as a query variable ...
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Setting a property by reflection with a string value

... You can use Convert.ChangeType() - It allows you to use runtime information on any IConvertible type to change representation formats. Not all conversions are possible, though, and you may need to write special case logic if you want to support conversions from t...
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How to get my IP address programmatically on iOS/macOS?

I would like to obtain my iPad's IP address programmatically. How can I query the networking subsystem to find out what my IPv4 (and IPv6) addresses are? ...
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What is __main__.py?

What is the __main__.py file for, what sort of code should I put into it, and when should I have one? 5 Answers ...